FIGURES 12–14 in Early nesting biology of the wood-nesting adventive bee, Lithurgus chrysurus Fonscolombe (Apoidea: Megachilidae: Lithurginae)

FIGURES 12–14. Microphotographs of cast exoskeletons from the same fourth instar of Lithurgus chrysurus in figures 10, 11. 12. Third instar exoskeleton with chorion, and first and second instar exoskeletons removed showing position (arrows) of cluster of 10 spiracles on each side. 13. Close-up of spiracles on right side figure12. 14. Close-up of spiracles on the right of the first instar with exoskeletons of second and third instars removed.